Lens-fitted photo film unit
US5907720A · kind A · utility
2Cited by
1References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1997 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Dec 2, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2219/045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a lens-fitted photo film unit having a main body portion containing a roll of unexposed photo filmstrip and having photographic mechanisms mounted thereto, and outer walls covering the main body portion, any clearance provided for relative movement between two adjacent members is made to be not less than any gap in outer walls of the film unit. Particle diameters of the sands, which may enter at any gap in the outer wall, are less than the gap and thus less than any clearance, so that the clearance is not clogged up with the sands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.